1. C. Downs and T. E. Vandervelde, in Proc. 2013 IEEE Conf. on Sensors, Baltimore, Nov. 4–6, 2013 (IEEE, New York, 2013), p. 5054.
2. A. Rogalski, J. Modern Optics 57, 1716 (2010).
3. Z. Shi, L. Wang, H. Zhen, et al., Nanoscale Res. Lett. 8 (1), 310 (2013).
4. A. Fiore, E. Roseneher, P. Bois, et al., Appl. Phys. Lett. 64, 478 (1994).
5. X. Q. Lu, X. Tong, N. Lan, and D. Y. Xiong, in Proc. 15th Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD), Taipei, Sept. 7–11, 2015 (IEEE, New York, 2015), p. 181.